xworm | da84387864bbf2260524869ce8a0e3a4ecaa1944382f1f8cdc16b6d0e58a0d14

General

Target

XClient.exe
Size

41KB
MD5

db6c027e6b063181f9ed3bc3cb11c331
SHA1

4aa00a4187098f342d4803fcaad8eea697ee0809
SHA256

da84387864bbf2260524869ce8a0e3a4ecaa1944382f1f8cdc16b6d0e58a0d14
SHA512

6a48d214931e334b0e9c077a134a6ef51325c8fc759504ecd825aeb46a7d2160f28ecb6ac1c231354ebb3a6c25ab64418712110d478545fd11933531bfcdea07
SSDEEP

768:nG2ZOWZ42nxuT3XvgggCLJF5PG9pm+6vOwh+3EmzO:nG2bZ42n07XvvgcFI9A+6vOwA9K

Score

10^/10

xworm execution persistence rat trojan

Malware Config

Extracted

Family

xworm

Version

5.0

C2

welcome-soon.gl.at.ply.gg:12447

Mutex

90L0iLfiAde2P6nu

Attributes

Install_directory
%AppData%
install_file
$77MicrosoftDefender.exe

aes.plain

Signatures

Detect Xworm Payload 2 IoCs

resource	yara_rule
behavioral2/memory/4964-1-0x0000000000170000-0x0000000000180000-memory.dmp	family_xworm
behavioral2/files/0x0013000000023a1d-59.dat	family_xworm

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
Xworm family
xworm

Command and Scripting Interpreter: PowerShell 1 TTPs 4 IoCs

Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

execution

PowerShell

T1059.001

pid	Process
3376	powershell.exe
4460	powershell.exe
2692	powershell.exe
2096	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\Control Panel\International\Geo\Nation	XClient.exe

Drops startup file 2 IoCs

description	ioc	Process
File created	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk	XClient.exe
File opened for modification	C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\$77MicrosoftDefender.lnk	XClient.exe

Executes dropped EXE 2 IoCs

pid	Process
2876	$77MicrosoftDefender.exe
2020	$77MicrosoftDefender.exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-2437139445-1151884604-3026847218-1000\SOFTWARE\Microsoft\Windows\CurrentVersion\Run\$77MicrosoftDefender = "C:\\Users\\Admin\\AppData\\Roaming\\$77MicrosoftDefender.exe"	XClient.exe

Looks up external IP address via web service 1 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
16	ip-api.com

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence execution

Scheduled Task

T1053.005

pid	Process
1744	schtasks.exe

Suspicious behavior: EnumeratesProcesses 9 IoCs

pid	Process
4460	powershell.exe
4460	powershell.exe
2692	powershell.exe
2692	powershell.exe
2096	powershell.exe
2096	powershell.exe
3376	powershell.exe
3376	powershell.exe
4964	XClient.exe

Suspicious use of AdjustPrivilegeToken 8 IoCs

description	pid	Process
Token: SeDebugPrivilege	4964	XClient.exe
Token: SeDebugPrivilege	4460	powershell.exe
Token: SeDebugPrivilege	2692	powershell.exe
Token: SeDebugPrivilege	2096	powershell.exe
Token: SeDebugPrivilege	3376	powershell.exe
Token: SeDebugPrivilege	4964	XClient.exe
Token: SeDebugPrivilege	2876	$77MicrosoftDefender.exe
Token: SeDebugPrivilege	2020	$77MicrosoftDefender.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
4964	XClient.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 4964 wrote to memory of 4460	4964	XClient.exe	93
PID 4964 wrote to memory of 4460	4964	XClient.exe	93
PID 4964 wrote to memory of 2692	4964	XClient.exe	95
PID 4964 wrote to memory of 2692	4964	XClient.exe	95
PID 4964 wrote to memory of 2096	4964	XClient.exe	99
PID 4964 wrote to memory of 2096	4964	XClient.exe	99
PID 4964 wrote to memory of 3376	4964	XClient.exe	101
PID 4964 wrote to memory of 3376	4964	XClient.exe	101
PID 4964 wrote to memory of 1744	4964	XClient.exe	106
PID 4964 wrote to memory of 1744	4964	XClient.exe	106

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\XClient.exe
"C:\Users\Admin\AppData\Local\Temp\XClient.exe"
1⤵
- Checks computer location settings
- Drops startup file
- Adds Run key to start application
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:4964
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Local\Temp\XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:4460
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess 'XClient.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2692
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionPath 'C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2096
- C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ExecutionPolicy Bypass Add-MpPreference -ExclusionProcess '$77MicrosoftDefender.exe'
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3376
- C:\Windows\System32\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "$77MicrosoftDefender" /tr "C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe"
  2⤵
  - Scheduled Task/Job: Scheduled Task
  PID:1744

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2876

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe C:\Windows\System32\shell32.dll,SHCreateLocalServerRunDll {9aa46009-3ce0-458a-a354-715610a075e6} -Embedding
1⤵
PID:1936

C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe
1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
PID:2020

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1

T1059

PowerShell

1

T1059.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Persistence

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1

T1547

Registry Run Keys / Startup Folder

1

T1547.001

Scheduled Task/Job

1

T1053

Scheduled Task

1

T1053.005

Defense Evasion

Modify Registry

1

T1112

Credential Access

Discovery

Query Registry

2

T1012

System Information Discovery

2

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\$77MicrosoftDefender.exe.log

Filesize
654B

MD5
2ff39f6c7249774be85fd60a8f9a245e

SHA1
684ff36b31aedc1e587c8496c02722c6698c1c4e

SHA256
e1b91642d85d98124a6a31f710e137ab7fd90dec30e74a05ab7fcf3b7887dced

SHA512
1d7e8b92ef4afd463d62cfa7e8b9d1799db5bf2a263d3cd7840df2e0a1323d24eb595b5f8eb615c6cb15f9e3a7b4fc99f8dd6a3d34479222e966ec708998aed1

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\powershell.exe.log

Filesize
2KB

MD5
d85ba6ff808d9e5444a4b369f5bc2730

SHA1
31aa9d96590fff6981b315e0b391b575e4c0804a

SHA256
84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

SHA512
8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
6d3e9c29fe44e90aae6ed30ccf799ca8

SHA1
c7974ef72264bbdf13a2793ccf1aed11bc565dce

SHA256
2360634e63e8f0b5748e2c56ebb8f4aa78e71008ea7b5c9ca1c49be03b49557d

SHA512
60c38c4367352537545d859f64b9c5cbada94240478d1d039fd27b5ecba4dc1c90051557c16d802269703b873546ead416279c0a80c6fd5e49ad361cef22596a

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
60945d1a2e48da37d4ce8d9c56b6845a

SHA1
83e80a6acbeb44b68b0da00b139471f428a9d6c1

SHA256
314b91c00997034d6e015f40230d90ebbf57de5dc938b62c1a214d591793dbe3

SHA512
5d068f1d6443e26ae3cad1c80f969e50e5860967b314153c4d3b6efd1cfa39f0907c6427bec7fa43db079f258b6357e4e9a1b0b1a36b1481d2049ea0e67909ed

Download Submit
C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

Filesize
944B

MD5
2a4825f4f95c5d3d72911c6e7eb902ca

SHA1
4c22133f24e77211313beb0831980029a53e7dde

SHA256
59eecad327a693c8b2e3a5932238cda2141c6a0afbba6a5587933c9f2c1025e0

SHA512
8e09a61c62a4b83f4f323b5b74f89cc26d708fd1fe646317f5f404af8d4d3fcf327f20f5e4a3b310786c0f639df2d17e1a51def08c95fa964928ad6c08c81386

Download Submit
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_y1tqx5ud.f4t.ps1

Filesize
60B

MD5
d17fe0a3f47be24a6453e9ef58c94641

SHA1
6ab83620379fc69f80c0242105ddffd7d98d5d9d

SHA256
96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

SHA512
5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

Download Submit
C:\Users\Admin\AppData\Roaming\$77MicrosoftDefender.exe

Filesize
41KB

MD5
db6c027e6b063181f9ed3bc3cb11c331

SHA1
4aa00a4187098f342d4803fcaad8eea697ee0809

SHA256
da84387864bbf2260524869ce8a0e3a4ecaa1944382f1f8cdc16b6d0e58a0d14

SHA512
6a48d214931e334b0e9c077a134a6ef51325c8fc759504ecd825aeb46a7d2160f28ecb6ac1c231354ebb3a6c25ab64418712110d478545fd11933531bfcdea07

Download Submit
memory/4460-3-0x0000027EB7AD0000-0x0000027EB7AF2000-memory.dmp

Filesize
136KB

Download
memory/4460-18-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4460-15-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4460-14-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4460-4-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4964-0-0x00007FFF59F73000-0x00007FFF59F75000-memory.dmp

Filesize
8KB

Download
memory/4964-52-0x00007FFF59F73000-0x00007FFF59F75000-memory.dmp

Filesize
8KB

Download
memory/4964-58-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4964-2-0x00007FFF59F70000-0x00007FFF5AA31000-memory.dmp

Filesize
10.8MB

Download
memory/4964-1-0x0000000000170000-0x0000000000180000-memory.dmp

Filesize
64KB

Download

Analysis

Sharing

General

Malware Config

Extracted

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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Downloads